Antifriction-roller and process of making same.



I, F. OCONNOR. ANTIFRICTION ROLLER AND PRocEss 0F MAKING SAME. APPLICATION FILED IAN. 2, i917.

1,273,909.. Patented my 30,1518.

= :sa H

y///{//////////////x/////////V// W/ INVENTOR cmfdz'md'r' BY I Ich W W Ark A A TTORNEK I UNITED srafriis 'sarna ernten. fj

JOHN F. ocoNNon., or CHICAGO, rumors, Asserion ro wLLrAr/r H. Minnie, or' i onlinr, New YORK.

ANTIFERICTION-ROLLER AND PROCESS GF MAKNG SAME.

To au Lv/wm z'nmag/ concern:

Be it known that l. JOHN F. OConnon, a citizen of the United States, residingr at Chicago, in the county of Cook and Sta-te of illinois, have invented a certain new and useful Improvement in Antifricticn-Rollersv and Processes of Making'Samc, of which the following' is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in anti-frictionurollers and process of making same.

The object of my invention is to provide a novel form of anti-friction roller and more particularly adapted for railway car side bearings` and process of nia-king the saine and wherein is employed an inner bushing el' one form ot cast material yand an outer section of cast material of a dilerent kind from the bushing, the construction 'of the parts and the yprocess being such that the outer material is chilled from within during the casting process and Without the necessity of external chills.

In the drawing 4forming a part of this specification, Figure 1 is an elevational view of a well known iype ot roller side bearing for railway cars, showing one use for my improved anti-'friction roller. Fig. 2 is a transverse sectional view ot the improve 'l roller, taken on the line 2-2 of Fig. And Fig. 8 is a longitudinal section of the roller illustrated in Fig; Figs. l and are views correspondingr to Figs. 2 an 0 Fig. 4: being taken on the line l---fl of *1b. 5 and Fig. 5 on the line 5-5 of Fig. a, but illustrating' another embodiment of the invention. Figs. 6 and 7 are views correspond ing respectively to Figs. 2 and 3, but illustrating a still further embodiment, f the inventioinligr. -6 being taken on tline 6 6 of Fig. 7. Figs 8 andi) are also views corresponding respectively to Figs. 2 and 3, but illustrating a fourtl'i embodiment of the in vention, Fig'. 9 being taken on the line il-Q of Fig. 8. y

Referring first to the construction illustratedin Figs. l, 2, and 3, l0 denotes a. base casting of a roller side bearing for railway cars, which is adapted to be riveted to the truck bolster l1 thereof. Mounted in the buse wast ing,r l0 is a rocking cradle 12 and carried in' the cradle 12 is an anti-friction roller A Specification of Letters Patent.

and at the same time provide a hard wearf ing outer surface and an inner wearing surtace on the axle which will be substantially selig-lubricating.

is the avoidance ot' casc-hardening and the use of chill molds, inasmuch as the expense of manufacture is therebyunaterially decreased. I

Patentediliily 30, 1918.*

Application led January 2, 1917. Serial No. 140,036.

Another desirable feature of entr-fruition rollers of the type indicatedv In carrying out my invention, l lirst provide a cast bushingV for the roller and then cast around the bushing the outer portion of the roller, at the same time employingmeans disposed around the bushing' for internally chilling, the outer portion ol' thc roller during the casting process thereof.v

In the arrangement illustratcdin `Figs.

found on an ordinary casting is removed by the annealingr process, thus leaving; a castingr the surrace 4oli which `is smooth and free from foreign matter. Furthermore, by cmployingr a malleable bushing', the same is substantially self-lubricating1 with respect to `the axleon which the roller is mounted on account oit the grapliitic carbon in the mallei able casting. in carrying out my invention the malleable bushing; 2O is preferably provided willi a sci ies ot circuniferentially exteiiding integral flanges 2l, the flanges 2l. being extended outwardly toward 'the surface of the' finished roller so that said flanges will act as -etlicient chills when the outer portion 22 ot the roller cast therearound ln actua practice, the outer sei-,tionv oli the roller 22 will be Jformed of White iron which will be snlliciently hardened due to the intcrnal chillingI by' the flanges 2l. .during the casting process. ltis furthermore obvious that the flanges 2ll securely interlock the bushing and the outer portion 22 oli-the roller. An additional advantage resultingr from the use olf a malleable iron bushing rf sides in the fact that no slag will be .termed at (lie junction between the bushingr and the outer metal. since' all lwand and scale will have been removed troni tlic bushing during the annealing process.

In the construction illastraterfi in Figs. and 5, 120 represents the inner malleable iron bushing having a series of longitudinally and radially extending ribs or anges 121 which, when the outer section 122 of White iron is cast therearonnd, will be enibedded in the White iron and thus effectively chill the latter during the castingprocess.

In the construction illuf-stratcd in Figs. G and 7, 220 represent-s the malleable iron hol- 10W bushing which, before the outer section 222 of White iron is cast thcrearound, has slipped thereover a coil ot steel or iron Wire 221 which acts as the chilling nieans for the outer White iron 222.

In the construction illustrated in Figs. 8 and 9, 320 represents a cent-ral holloiv bushing of malleable iron, 322 the outer section of White iron cast therearound, and 321 a series of rods or bars disposed circumferentially around the bushing and parallel to the axis thereof for chilling; the White iron 322.

From the preceding description, it will be seen that the anti-riction roller which I have produced may be cheaply manufactured by a very simple process and at the Same time obtaining a bushing* which is substantially self-lubricating and an outer hearing surface of hardened material Without the use of chill molds. l

Although I have herein shown and def scribed different embodiments of the invention, the same are merely illustrative and I contemplate all changes and modifications that come Within the scope of the clainis appended hereto.

I claim: y

1. As an article of manufacture, an antiyfriction roller adapted for use in side bearneraeoe infr an anti-friction roller ada )ted or'use in side bearings and the like which consists, 1n providingn a hollo'vv4 bushingF ot malleable iron, providing means disposed around said bushing adapted to actas chills, and casting: the outer portion ot the roller of white iron around said bushing and Vwith said means embedded therein.

S. As an article of manufacture, an antifrietion roller adapted for use in side bearings and the like,A said roller comprising an inner bushing centrally and axially recessed, Said bushing being formed of malle. ihle iron and having a plurality of cirouinferentially extending integral lianges, and an outer section of white iron Cast around the bushing ivi-th said flanges embedded therein.

e. The herein descril'aed process of making; an anti-friction roller adapted tor use in side bearings and the like 'i consists, in first providing` a malleable iron bushing* having an axially extending' recess and a plurality cgt integral, circuniterentially eX- tending flanges, and then casting about said bushing a section of white iron with said iianges embedded therein.

In witness that I claim the foregoing I have hereunto subscribed my naine this 29th day of Dec. 1916.

Jenn r. 'oconnon 

